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308 CR Mini Hydraulic Excavator

308 CR Mini Hydraulic Excavator

Mini Excavators Inspired by Our Customers

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More Comfort – More Performance – More Versatility

  • 4 Industry First Features

    Cat Exclusives in a Mini Excavator

  • Up to 10% Lower Total Ownership Costs

    with improved fuel efficiency and longer service intervals

  • Up to 20% More Performance

    with customizable operator settings and improvements in lift, swing, travel and multifunction

Engine

Bore 3.7 in
Displacement 203 in³
Engine Model Cat C3.3B
Gross Power - SAE J1995 74.3 hp
Net Power 69.5 hp
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 69.5 hp
Stroke 4.7 in

Weights

Maximum Operating Weight with Cab** 20077 lb
Minimum Operating Weight with Cab* 18610 lb
Note (1) *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket.
Note (2) **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.
Operating Weight 20077 lb

Weight Increase from Minimum Configuration

Counterweight 552 lb
Long Stick 146 lb
Steel Tracks with Pads 752 lb

Travel System

Gradeability - Maximum 30 degrees
Ground Pressure - Maximum Weight 5.8 psi
Ground Pressure - Minimum Weight 5.4 psi
Maximum Traction Force - High Speed 6250 lb
Maximum Traction Force - Low Speed 15175 lb
Travel Speed - High 3.2 mile/h
Travel Speed - Low 1.9 mile/h

Service Refill Capacities

Cooling System 2.6 gal (US)
Engine Oil 3 gal (US)
Fuel Tank 39 gal (US)
Hydraulic System 29 gal (US)
Hydraulic Tank 14 gal (US)

Hydraulic System

Digging Force - Bucket 13946 lb
Digging Force - Stick - Long 8032 lb
Digging Force - Stick - Standard 9509 lb
Maximum Auxiliary Circuit - Primary - Flow at Pump 35 gal/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump 4134 psi
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134 psi
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Operating Pressure - Equipment 4134 psi
Operating Pressure - Swing 3626 psi
Operating Pressure - Travel 4134 psi
Pump Flow at 2,400 rpm 44 gal/min
Type Load Sensing Hydraulics with Variable Displacement Piston Pump

Swing System

Boom Swing - Left 60 degrees
Boom Swing - Right 50 degrees
Machine Swing Speed 10.6 r/min

Blade

Height 17 in
Width - Standard 90.6 in
Width - Wide 96.5 in

Certification - Cab

Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997
Top Guard ISO 10262:1998 (Level I)

Sound

Average Exterior Sound Pressure (ISO 6395:2008) 99 dB(A)
Note European Union Directive "2000/14/EC"
Operator Sound Pressure (ISO 6396:2008) 72 dB(A)

Dimensions - Standard Stick

Boom In Reach 120.4 in
Boom Swing - Left 23.8 in
Boom Swing - Right 36.8 in
Cab Height 100 in
Dig Depth 161.7 in
Ground Clearance 13.8 in
Height - Boom Transport - No Tools* 95.7 in
Height - Boom Working - With Tools** 104.7 in
Maximum Blade Depth 16 in
Maximum Blade Height 14.6 in
Maximum Dig Height 265.2 in
Maximum Dump Clearance 187.4 in
Maximum Reach 281.1 in
Maximum Reach - Ground Level 273.6 in
Note *Boom Height when stick is pinned in transport position with no attachments.
Note (1) **Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Note (2) ***With blade positioned at the rear of the machine.
O/A Track Width 90.6 in
O/A Undercarriage Length 113.4 in
Overall Shipping Length - with Counterweight 264 in
Overall Shipping Length - without Counterweight 258.8 in
Stick Length 71.7 in
Swing Bearing - Height 29.7 in
Tail Swing with Counterweight 62.4 in
Tail Swing without Counterweight 57.1 in
Track Belt/Shoe Width 17.7 in
Vertical Wall 117.8 in

Dimensions - Long Stick

Boom In Reach 126.6 in
Boom Swing - Left 23.8 in
Boom Swing - Right 36.8 in
Cab Height 100 in
Dig Depth 182.8 in
Ground Clearance 13.8 in
Height - Boom Transport - No Tools* 89 in
Height - Boom Working - With Tools** 120.1 in
Maximum Blade Depth 16 in
Maximum Blade Height 14.6 in
Maximum Dig Height 277.1 in
Maximum Dump Clearance 199.7 in
Maximum Reach 300.7 in
Maximum Reach - Ground Level 293.7 in
Note *Boom Height when stick is pinned in transport position with no attachments.
Note (1) **Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Note (2) ***With blade positioned at the rear of the machine.
O/A Track Width 90.6 in
O/A Undercarriage Length 113.4 in
Overall Shipping Length - with Counterweight 6872 mm (270.6 in)***
Overall Shipping Length - without Counterweight 6872 mm (270.6 in)***
Stick Length 92.8 in
Swing Bearing - Height 29.7 in
Tail Swing with Counterweight 62.4 in
Tail Swing without Counterweight 57.1 in
Track Belt/Shoe Width 17.7 in
Vertical Wall 134 in

Air Conditioning System

Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.

Sustainability

Recyclability 96%

Download resources

308 CR Product Brochure
Cat Mini Hydraulic Excavators Product Line Brochure (North America)
Cat Mini Hydraulic Excavators Product Line Brochure (Europe)
Options And Accessories Kit Guide for Mini Hydraulic Excavators
Cat Attachments for Mini Excavators Brochure
Attachment Compatibility Guide for Mini Excavators

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